tree fa40b981c48269274183da0bebc9db3cad2c2f92
parent 30f1e3dd8c72abda343bcf415f7d8894a02b4290
author Oleg Nesterov <oleg@tv-sign.ru> 1150387922 +0400
committer Linus Torvalds <torvalds@g5.osdl.org> 1150566733 -0700

[PATCH] arm_timer: remove a racy and obsolete PF_EXITING check

arm_timer() checks PF_EXITING to prevent BUG_ON(->exit_state)
in run_posix_cpu_timers().

However, for some reason it does so only for CPUCLOCK_PERTHREAD
case (which is imho wrong).

Also, this check is not reliable, PF_EXITING could be set on
another cpu without any locks/barriers just after the check,
so it can't prevent from attaching the timer to the exiting
task.

The previous patch makes this check unneeded.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>